SamuraiWP is a system to monitor and manage WordPress websites.   It has a plugin that goes on the remote WordPress site which reports back to the information such as Version information (WordPress, Plugins and Themes) as well as the status of backups and security information.

There is also an active test where a connection to the site is made every 5 minutes to test connect speed and that the site is live

Create a system for managing WordPress sites which includes monitoring of the status of WordPress web sites, including versions, backups and updates improving site security and operational insight.
Automation system which reduced initial setup time for a WordPress site from an hour to 5 minutes
Reporting system to automate client and internal reporting